Abstract The structural, surface chemical and catalytic properties of the materials belonging to the SiO2 Al2O3 system are reviewed critically. In particular, amorphous silicas, transitional aluminas, different silica-aluminas (silica-rich and alumina-rich) and protonic zeolites are taken into consideration. The nature of the acid sites, of the Lewis and of the Bronsted type, over these surfaces is discussed and rationalized, based on the fundamental chemistry and structural chemistry of silicon and aluminum compounds.

中文翻译：

---

基于二氧化硅和氧化铝的催化材料：结构特征和表面酸性的产生

摘要 对SiO2 Al2O3 体系材料的结构、表面化学和催化性能进行了批判性评价。特别地，考虑了无定形二氧化硅、过渡氧化铝、不同的二氧化硅-氧化铝（富二氧化硅和富氧化铝）和质子沸石。基于硅和铝化合物的基本化学和结构化学，讨论并合理化了这些表面上的路易斯型和布朗斯台德型酸位的性质。